Bill Richardson: My recent endorsement of Barack Obama for president has been the subject of much discussion and consternation -- particularly among supporters of Hillary Clinton. Led by political commentator James Carville, who makes a living by being confrontational and provocative, Clinton supporters have speculated about events surrounding this endorsement and engaged in personal attacks and insults. While I certainly will not stoop to the low level of Mr. Carville, I feel compelled to defend myself against character assassination and baseless allegations.
